Update TabGridLayoutAndroid variations in fieldtrial testing config

The parameter "thumbnail_aspect_ratio" is still not specified yet.

See also: go/clank-sand-wedge

Bug: 930979
Change-Id: Ie7318a57c041b39a6dd55b7929c9c1d80f21b40e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2112112Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Commit-Queue: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#752200}

testing/variations/fieldtrial_testing_config.json

@@ -5440,7 +5440,11 @@
                 {
                     "name": "Enabled",
                     "params": {
-                        "tab_grid_layout_android_new_tab": "NewTabVariation"
+                        "allow_to_refetch": "true",
+                        "enable_search_term_chip": "true",
+                        "enable_search_term_chip_adaptive_icon": "true",
+                        "tab_grid_layout_android_new_tab": "NewTabVariation",
+                        "tab_grid_layout_android_new_tab_tile": "NewTabTile"
                     },
                     "enable_features": [
                         "TabGridLayoutAndroid"